The man accused by the US government of accessing more than 73,000 US military machines has lost his second appeal to the Home Office against extradition.

McKinnon's recent diagnosis with Asperger's Syndrome, a condition on the autistic spectrum, had not changed home secretary Jacqui Smith's decision that the self-confessed Nasa hacker be extradited, said McKinnon's solicitor Karen Todner on Monday.

"The secretary of state has advised via the treasury solicitors that, despite Mr McKinnon's diagnosis with Asperger's, she will now be making arrangements for his extradition pursuant to her order for extradition of 4 July, 2006," said Todner. "We are now considering whether or not Mr McKinnon has a further judicial remedy and we are urgently investigating this issue."

The US has accused McKinnon of hacking into 97 US army, navy, air force and Nasa computers, and causing damage costing hundreds of thousands of dollars by deleting files. McKinnon has never denied hacking US military systems, but denies causing extensive damage. He claims he was initially searching for evidence of extra-terrestrial life, and later found evidence of anti-gravity projects.

The Home Office declined to comment on why McKinnon's appeal had been turned down, and why his recent diagnosis with Asperger's Syndrome was not sufficient grounds to consider an appeal.

However, it is understood that the Home Office sent a letter rejecting McKinnon's appeal to his solicitors on Monday. ZDNet.co.uk understands that the Home Office believes its position has been vindicated by several courts, who successively found in favour of the Home Office, before McKinnon's Asperger's diagnosis. The final representations made to the Home Office gave no basis for overturning the order for extradition, ZDNet.co.uk understands. The reasons for McKinnon's appeal to the Home Office being dismissed were set out in the letter sent to McKinnon's solicitors.

McKinnon's legal team told ZDNet.co.uk in September that, should McKinnon's Home Office appeal be dismissed, the team was preparing an application to the High Court to appeal against McKinnon's extradition. Todner told ZDNet.co.uk at the time that she would also consider a judicial review of the home secretary's decision, should Smith decline McKinnon's appeal.

This is the second appeal to the Home Office in McKinnon's long-running legal battle to avoid extradition. McKinnon lost his first appeal to the Home Office in July 2006, when the then home secretary John Reid dismissed his representations.

Thank You

By registering you become a member of the CBS Interactive family of sites and you have read and agree to the Terms of Use, Privacy Policy and Video Services Policy. You agree to receive updates, alerts and promotions from CBS and that CBS may share information about you with our marketing partners so that they may contact you by email or otherwise about their products or services.
You will also receive a complimentary subscription to the ZDNet's Tech Update Today and ZDNet Announcement newsletters. You may unsubscribe from these newsletters at any time.